Venture capital investment in U.S. cleantech companies grew 73 percent to $1.1 billion in the third quarter of 2011 versus the same period in 2010, with the gains driven largely by deals in the energy storage sector, according to an Ernst & Young LLP analysis of data from Dow Jones VentureSource.

Investors put $421 million into energy storage companies during the quarter, with developers of fuel cells accounting for $225.5 million.

In Massachusetts, VCs invested $170.4 million in cleantech companies, 65 percent more than during the same period in 2010. That placed Massachusetts in second place behind California, where companies raised $583 million in Q3.

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